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Units 3 and 4 ­ Revision
notes
SNAB

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2.3.1 ­ CELL ORGANELLES (EUKARYOTIC CELL)
Figure 3.8 ­ A 3D animal cell (eukaryotic)

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Organelle Structure and function
Nucleus enclosed in double membrane with pores
contains chromosomes with genes made of DNA to control protein synthesis
Ribosomes made of RNA and protein
free in cytoplasm or attached to RER
site of protein synthesis
Rough endoplasmic reticulum
interconnected sacs with ribosomes attached
transport proteins to…

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2.3.2 ­ PROTEIN SYNTHESIS

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Proteins synthesised on the ribosomes of the RER are moved to other parts of the cell through
the cavities of the endoplasmic reticulum.
The Golgi apparatus is a stack of membrane-bound sacs formed from fused vesicles from the
ER.
Proteins are modified here and packaged in vesicles. Some eg enzymes…

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2.3.4 ­ THE CELL CYCLE

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Mitosis is a type of cell division, which retains the full or diploid number (2n) of chromosomes.
In humans, a cell with 46 chromosomes divides to form 2 identical daughter cells, each with 46
chromosomes.
Before nuclear division, a copy of each chromosome is made by semi-conservative replication
of the…

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Pages in this set

Page 1

Preview of page 1

Page 2

Preview of page 2
Units 3 and 4 ­ Revision
notes
SNAB

Page 3

Preview of page 3

Page 4

Preview of page 4
2.3.1 ­ CELL ORGANELLES (EUKARYOTIC CELL)
Figure 3.8 ­ A 3D animal cell (eukaryotic)

Page 2

Page 5

Preview of page 5

Page 6

Preview of page 6
Organelle Structure and function
Nucleus enclosed in double membrane with pores
contains chromosomes with genes made of DNA to control protein synthesis
Ribosomes made of RNA and protein
free in cytoplasm or attached to RER
site of protein synthesis
Rough endoplasmic reticulum
interconnected sacs with ribosomes attached
transport proteins to…

Page 7

Preview of page 7
2.3.2 ­ PROTEIN SYNTHESIS

Page 8

Preview of page 8
Proteins synthesised on the ribosomes of the RER are moved to other parts of the cell through
the cavities of the endoplasmic reticulum.
The Golgi apparatus is a stack of membrane-bound sacs formed from fused vesicles from the
ER.
Proteins are modified here and packaged in vesicles. Some eg enzymes…

Page 9

Preview of page 9
2.3.4 ­ THE CELL CYCLE

Page 10

Preview of page 10
Mitosis is a type of cell division, which retains the full or diploid number (2n) of chromosomes.
In humans, a cell with 46 chromosomes divides to form 2 identical daughter cells, each with 46
chromosomes.
Before nuclear division, a copy of each chromosome is made by semi-conservative replication
of the…

Comments

No comments have yet been made